Codex Mac App File Content Side Panel Jittering

What version of the Codex App are you using (From “About Codex” dialog)?

Version 26.429.30905 (2345)

What subscription do you have?

Pro

What platform is your computer?

Darwin 25.2.0 arm64 arm

What issue are you seeing?

https://github.com/user-attachments/assets/e44b1f3e-700e-48fb-9345-8fe124eb657f

When opening a file link refs by the AI agent on the side panel, the file content begins to flicker continuously and does not stop.

What steps can reproduce the bug?

I observed that this issue only occurs when opening a large file while the side panel is closed. If the side panel is already open, reopening the same file does not trigger the problem.

What is the expected behavior?

It should not flicker at all.

Additional information

_No response_